Microgaming Slots

Last updated: 2026-05-10

Quick take: Best for players chasing record-breaking jackpots or classic branded slots — Microgaming built the foundation of progressive jackpot gaming online.

Microgaming launched the first real-money online casino software in 1994 from its Isle of Man base, and went on to build a catalog of over 800 titles. The company introduced the Mega Moolah progressive network, which set a Guinness World Record in October 2015 when a single spin paid out £13,209,300. In 2022, Microgaming sold its game development division and intellectual property to Games Global Limited. By 2024, the original company had fully rebranded as Apricot Investments, shifting its focus to platform technology and studio investment rather than content creation. The games and titles you know today — Mega Moolah, Immortal Romance, Thunderstruck II — now sit under the Games Global banner, alongside content from a network of exclusive partner studios.

Popular Microgaming Slots

• Mega Moolah
• Immortal Romance
• Thunderstruck II
• Couch Potato
• Atlantean Treasures: Mega Moolah
• 9 Pots of Gold Slot
• 9 Pots of Gold HyperSpins
• Hyper Strike HyperSpins
• Dr. Watts Up
• Break Away Gold
• Break Away Max

Key Titles at a Glance

Mega Moolah

Mega Moolah is the centerpiece of the catalog and the most record-setting progressive slot in online history. The Mega jackpot seeds at €1 million with no upper cap — which is how it reached £13.2 million in 2015. Base game RTP sits below the 96% industry average because a portion of every bet funds the jackpot pool. The trade-off is a life-changing potential payout that no fixed-prize slot can match. The jackpot is triggered randomly by a bonus wheel, and larger bets raise (but never guarantee) the odds of reaching it.

Immortal Romance

Immortal Romance is a 5-reel, 243-ways vampire-themed slot with a 96.86% RTP — well above the 96% industry benchmark. The Chamber of Spins bonus unlocks four distinct free spins modes, each tied to a different character and offering progressively higher multipliers. It remains one of the most consistently available titles across licensed casinos.

Thunderstruck II

Thunderstruck II shares the same 5-reel, 243-ways format as Immortal Romance. RTP is 96.65%, also above average. The Great Hall of Spins reveals four Norse god bonus rounds — Valkyrie, Loki, Odin, and Thor — each unlocked in order over multiple triggering spins. Odin's round applies a 6x multiplier to wild wins; Thor's adds rolling reels on top of free spins. It is one of the few titles from its era still widely distributed by modern casinos.

Couch Potato

Couch Potato is a 3-reel, single-payline classic with a 97.43% RTP — the highest of the confirmed Microgaming titles and significantly above the industry average. A wild on the payline applies a 5x multiplier; two wilds in the same win push that to 25x. No bonus rounds and no scatter pay. It rewards patient play on a very simple math model.

The Mega Moolah Network

Multiple Games Global titles feed into the same Mega Moolah jackpot pool. Atlantean Treasures: Mega Moolah is one example — an underwater-themed game that runs the same four-tier jackpot structure (Mini, Minor, Major, Mega) alongside its own base game features. Any player on any linked title can trigger the jackpot wheel at any moment, independent of what is happening on the reels.

Partner Studios

Under Games Global, new Microgaming-label content comes from a network of exclusive studios. Gameburger Studios, a US-based team founded in 2019, developed the 9 Pots of Gold series and Hyper Strike HyperSpins — Irish-themed and retro designs built around the HyperSpins respin mechanic. Other partners include Stormcraft Studios, Triple Edge Studios, Alchemy Gaming, and Neon Valley Studios, each producing titles exclusively for the Games Global network.

Further reading: BeGambleAware resources, Gambling Commission guidance

About Microgaming: Pioneering Excellence Since 1994

Microgaming stands as one of the true pioneers of the online casino industry, having launched the world's first true online casino back in 1994. With over three decades of innovation and excellence, this Isle of Man-based software provider has cemented its position as a legendary name in gaming entertainment. Today, Microgaming boasts an impressive portfolio of over 800 games, ranging from classic slots to progressive jackpots that have created countless millionaires worldwide.

The company's commitment to quality and innovation has made Microgaming slots a staple at top-rated online casinos. Their games are renowned for exceptional graphics, engaging gameplay mechanics, and fair RTP rates that keep players coming back for more. Whether you're a fan of traditional slot machines or cutting-edge video slots with immersive storylines, Microgaming delivers an unmatched gaming experience.

Licensing and Player Protection

Trust and security are paramount when choosing where to play, and Microgaming excels in this area. The provider holds licenses from prestigious regulatory bodies including the Malta Gaming Authority (MGA) and the UK Gambling Commission (UKGC), ensuring their games meet the strictest standards for fairness and player protection.

Additionally, all Microgaming games are certified by eCOGRA (eCommerce Online Gaming Regulation and Assurance), an independent testing agency that verifies game fairness and random number generator integrity. This certification gives players peace of mind that every spin is genuinely random and that the stated RTP percentages are accurate. When you play Microgaming slots at licensed UK casinos, you can be confident you're getting a safe and fair gaming experience.

Popular Microgaming Games and Record-Breaking Jackpots

Microgaming's game library includes some of the most iconic titles in online casino history. Mega Moolah, often called the "Millionaire Maker," has paid out more progressive jackpots than any other online slot, with the world record payout of £18.9 million in 2018. This African safari-themed slot features four progressive jackpots, with the Mega jackpot regularly exceeding £10 million before it drops.

Immortal Romance remains one of the most beloved slots in the vampire genre, featuring an intricate storyline with four unique free spin features and a maximum win potential of 12,150x your stake. The game's Wild Desire feature can randomly trigger, turning up to five reels completely wild for massive winning potential.

Meanwhile, Thunderstruck II continues the Norse mythology saga with its Great Hall of Spins feature, offering four different free spin modes that unlock as you play. The Wildstorm feature can randomly create an entire reel of wilds, leading to spectacular wins. Book of Oz takes players on a magical journey with expanding symbols and respins, offering generous RTP and volatility that appeals to both casual players and high rollers.

Progressive Jackpot Network: Life-Changing Wins

The crown jewel of Microgaming's offering is undoubtedly their progressive jackpot network. Connected across hundreds of online casinos, Microgaming's progressive slots have created more millionaires than any other provider in the industry. The network includes not just Mega Moolah, but also titles like Major Millions, King Cashalot, and Treasure Nile.

What makes Microgaming's progressive jackpots so attractive is their frequent payouts and transparent mechanics. The Mega Moolah jackpot wheel bonus, for instance, can trigger randomly on any spin, giving every player—regardless of bet size—a chance at winning one of four jackpots. The Major jackpot typically pays out between £10,000 and £100,000, while the Mega jackpot averages over £5 million per payout. These record-breaking wins have transformed lives and established Microgaming as the go-to provider for jackpot hunters.

Innovative Features and Game Mechanics

Microgaming has never been content to rest on its laurels. The provider has embraced modern innovations like Megaways mechanics, partnering with Big Time Gaming to create slots with up to 117,649 ways to win. Titles like Shamrock Holmes Megaways combine the proven Megaways formula with Microgaming's signature polish and creativity.

The company also excels at creating classic slots that appeal to traditionalists. Games like Break Da Bank and Triple Sevens capture the essence of land-based fruit machines while incorporating modern features like multipliers and bonus rounds. For fans of branded content, Microgaming has developed officially licensed games based on popular franchises, bringing familiar characters and storylines to the reels.

From cascading reels and expanding wilds to innovative bonus rounds and gamble features, Microgaming continuously pushes the boundaries of what's possible in online slot design. Their games often feature adjustable volatility options, allowing players to customize their experience based on their preferred playing style.

RTP and Volatility: Player-Friendly Returns

One of Microgaming's strengths is their commitment to fair and transparent RTP (Return to Player) percentages. Most Microgaming slots offer RTPs ranging from 95% to 97%, which is highly competitive in the industry. Popular titles like Immortal Romance (96.86%), Thunderstruck II (96.65%), and Book of Oz (96.50%) all sit comfortably above the industry average.

The provider offers games across the full volatility spectrum. High volatility slots like Mega Moolah offer the chance for massive wins but with less frequent payouts, while medium volatility games like Thunderstruck II provide a balanced experience with regular wins and occasional big hits. Low volatility options ensure casual players can enjoy extended gaming sessions without depleting their bankroll too quickly.

Mobile Gaming Excellence

Recognizing the shift toward mobile gaming, Microgaming has ensured their entire portfolio is optimized for smartphones and tablets. Using HTML5 technology, Microgaming slots deliver the same high-quality graphics and smooth gameplay on mobile devices as on desktop computers. The responsive design automatically adapts to different screen sizes, whether you're playing on an iPhone, Android device, or tablet.

Mobile players can access the full range of features, including bonus rounds, progressive jackpots, and free spins, without any compromise in quality or functionality. The touch-screen interface is intuitive, making it easy to adjust bet sizes, spin the reels, and access game rules with simple taps and swipes. Many of the biggest progressive jackpot wins have actually been won by players on mobile devices, proving that you don't need to be at a desktop to hit life-changing wins.

Awards and Industry Recognition

Microgaming's excellence hasn't gone unnoticed by the industry. The company has won numerous awards over the years, including multiple EGR B2B Awards for Innovation in Slot Provision and Game of the Year accolades. Their commitment to responsible gaming and support for charitable causes through the Microgaming PlayItForward initiative has earned additional recognition beyond pure gaming excellence.

As an industry pioneer, Microgaming has set standards that others follow. They were among the first to embrace mobile gaming, the first to launch progressive jackpot slots online, and continue to be at the forefront of emerging technologies like virtual reality gaming. This legacy of innovation combined with a massive game library makes Microgaming a must-have provider at any serious online casino.

Whether you're chasing the multi-million pound Mega Moolah jackpot, enjoying the atmospheric storytelling of Immortal Romance, or spinning the reels of a classic fruit machine, Microgaming slots offer something for every type of player. With their proven track record, player-friendly RTPs, and commitment to innovation, Microgaming remains one of the most trusted and celebrated names in online gaming.